31234040 has 16 divisors (see below), whose sum is σ = 70276680. Its totient is φ = 12493600.

The previous prime is 31234009. The next prime is 31234061. The reversal of 31234040 is 4043213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390386 + ... + 390465.

Almost surely, 2^31234040 is an apocalyptic number.

It is an amenable number.

31234040 is an abundant number, since it is smaller than the sum of its proper divisors (39042640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31234040 is a wasteful number, since it uses less digits than its factorization.

31234040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780862 (or 780858 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 31234040 is about 5588.7422556421. The cubic root of 31234040 is about 314.9266311026.

Adding to 31234040 its reverse (4043213), we get a palindrome (35277253).

The spelling of 31234040 in words is "thirty-one million, two hundred thirty-four thousand, forty".